VitaminD sources

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VitaminD sources. There are three natural Vitamin D sources:

Special Notes:

As people become more careful about sun exposure and its possible causing of skin cancers, many use sunscreens with SPF 15 or higher. These inhibit the production of Vitamin D.Some medical personnel advise 20 min of sun exposure a day without sunscreen so as to overcome this problem. You need to get the advice of your medical provideron this topic - especially if you have any history of skin cancers.

In northern latitudes (eg. North of Boston, USA) there is not enough radiation especially in winter and so natural sunlight is not a real source of Vitamin D and supplements may be recommended.
Some people have a genetic difficulty in converting sunlight into Vitamin D (These are often the folks whose parents and grandparents had Osteoporosis, broken bones in their mature years. Also the conversion of sunlight to Vitamin D depends on skin pigmentation. Lighter skin is better able to convert sunlight into vitamin D.

After age 70. There are changes in skin that occur around age 70 that make it more difficulty for the skin to use sunlight as one of its Vitamin D Sources. This is a normalpart of aging but you need to take this into account when estimating your daily exposure to this essential vitamin. Many persons older than 70 need supplements or if they have been using supplements they need to add to their amount.

Food manufactures of dairy products and many cereals fortify their productswith this vitamin. Read the label and take these sources into account when estimatingyour daily intake.